Pasteurizing process.



VW H.PARK.

PASTEURIZING PROCESS.

APPLICATION FILED FEB. 1 1911,

LUU9 fi86m Patented Nov. 21, 1911.

fittest:

084.4% aha 1901 by Q Arty lie it ltnewn I a citizen oi the i ml State, a of the borough of lainliuttuxul iii the county 01? flew York, city and State ell W have invented certain new ziiul tlrzit preveinents in. Pes'teuriiaine; Freer V which the following is e speciiiuitie it The invention reletes'te n. prece pesteurizing milk end. ether liquids, eutl its objects are among others, to previtie ii pres ess whereby the liquid, eiter being l'iezitetl to a, peeteurizieg temperature may he u iiutuiiietl at that temperature tor u sulluieut P6llO(l to insure the tlierough elimination bacteria while flowing eentiiiutuiely from the heating apperetue to the ceeler er ether receptacle Mill to iiieure ite epe etieri against eceieleirtelm" iuteiitieueil inter-rep time.

it will lJOlmtl! to have the pilbdilllliilllgl 'tiiiueus anti tl e flew eil? t zipperetus, lll'liiOU mining it tier the proper temperature, through ceelei -itt such it device is usetl lied to the rempteele iii which it is t0 be transported cumuiueue .50 that, it is only necessary for the epcriiters to feed; the milk at one euil 0f the upperuvtus and withdrew it liretm the 0th order to secure its thorough. pest All uuneceseziry tleliiy time we. the handling etl the liqui iulerme beginning; end the eiitl oi the preewe vietetl. {lilting tn the tart however that the ineveineiilie 0ft lieu l in p u through containers of eensitlemhle he rieefl t iuliit is (leeimlile ."lllfil'i. (103lmumel; cent-relied. by ordinary uieelemienl ane ia. and 1S elifeeterl in ermini-5 "Ways by tien between it micl the wells illltl ether 'lF; eli- I heater and re'tuiiiii 'ieut value in are. ep

lii'niteel 'lZU such are eppzirutus Sine process may he cer cl eut iii any sui epperetus wliether proviclecl witl': a. heater re:- re ceele forming u, pert llllfil fifif met e eutl that the liquid msly heeled. eey (iii LlGSllBlil manner, and cells el t0 flew to tleeiretl receptacle eitter being sulriecletl it; the action elf this preeeesi l'u the eceeinpzmyihp; elre'wiiip e, l illus-rtmtetl an apparatus e est; play he (ifll'l'lfitl ent, will in t iixge lligure l u we. 'ezil uiell' ul' eueli 2m. uppmrutusl ziiu'l Fig. "i2: VOllliill erose :seelien ct the em re en f2--i2 of l. 1g. 1, lceliiiip; ll if. (l' celetl by the arrows.

in order m l; :pleiu the prev scribe the uctice the uppe ii: the alrziwiutpi, ill which ll. cylitltlricel holder previtlerfl 7 horizontal {hinges l) eccuretl tn the wall of the lieltler Mill prejecti' C upward. he purpose 0i these time. to prevent the liquid from guvitelii Ward the button] 0i the hultler elm Walls. l here iimuul by careful experiiu that there is ii tendency oil? the llqlllt'l the holder to lll'il-Ylliillfl mere "tll lll f the Wells than in the interim" e'l' ell liquid the :iii. llhis: lr-2 llue te llie Me; of the liquitl l" time pulp H3 ill; the

that the eepli wells unit that as; seen us he liflmtl nenlls ceeleml it will elnrt lit wuiwl the llUli'Olll ml the lieliler emu that. the lowerii ell its increases its specific a; gravity re liquid on the same level in the interior. The flanges D will tend to prevent thug elation and give the cooling liquiil ut the walls an inward and slightly upward movement.

The supply pipe J is provided with a} valve J by which the llew of liquid 10 the hehier nmy he regulated so us to provide for llw filling :iiul emptying thereof ill) rate that will iueure proper pueteurimtien. .lcly puking the depending eutlet tulle elf the re )tucle ll el the preper sire zrerl capacity,

l b ewe /er, :i reemplisliecl ll; uni'y lie without the use of a valve, and in this case a more rapid flow of liquid than is desired cannot be caused.

The outlet is through the pipe H leading from the bottom of the holder to a point near the top thereof, and provided with a branch pipe H extending through the wall of the holder and adapted to be used for the filling of any suitable receptacle. In order that all siphoning action of this pipe may be avoided, its upper end extends above the outlet level and is open. It will be seen that when the liquid rises to the level of the branch pipe H, it will begin to flow out from the bottom of the holder through this pipe and will continue to flow out as long as the liquid is supplied to the holder. WVhen the supply ceases, the liquid remaining in the holder may be siphoned out by stopping the upper end of the pipe H, or discharged through the outlet E in the extreme bottom of the holder, which is ordinarily closed by the valve E. This outlet is also useful in the operation of cleaning the holder and, where the contents are siphoned out, for draining the bottom thereof. The

pipe H joins the pipe E at its lower end,

and this pipe may be provided with a sight g'l-ass E in order that the operator or inspector, under whose supervision the pasteuriza'tion is carried on, may be sure that no liquid is being discharged through this .pipe during the normal operation of the apparatus. The pipe E is provided with a joint secured by a collar E and the pipe 7 H with a similar collar-secured joint H in order that they may be removed for thorough cleansing and for transportation purposes.

The receptacle G is positioned and supported upon a cross-piece L secured to the walls of the holder and extending diametrically across the same. This receptacle is provided with an overflow pipe M, and this pipe may be used for the purpose of preventing an overflow from the said receptacle in case the operator fails to observe the influx of liquid and-regulate it so that the pipe J will not supply liquid faster than it can escape through the neck G This pipe M extends through the wall of the holder and may be arranged to discharge the liquidoverflowing through it into any suitable receptacle or to convey it back to the holder or the source of supply.

At times, instead of subjecting the liquid to a moderate heat for a comparatively long period, it is desirable to subject it to a higher temperature for a shorter period. Thus, for instance, it is'common practice to subject liquid toa temperature of 150 degrees for thirty minutes or to a temperature of 169 degrees or more for fifteen minutes,

and the period will vary in an inverse ratio of the temperature within prescribed limits.

In the case last mentioned it is, of course,

desirable to have the holder so arranged that the liquid entering it will be discharged therefrom after a shorter period, and I have therefore provided the branch. pipe H made portion of the pipe is made detachable by means of a joint secured by the collar H Through the use of this valve-controlled branch pipe the liquid may be discharged below thenormal outlet when desired.

It will be apparent. that the apparatus above described is not essential to the carrying out of the process herein described and claimed, and that other apparatus may be employed, or some of the apparatus vdispensed with, and its function manually performed. I prefer, however, to use the apparatus described and shown for the purpose of effectuating the process.

It is for the purpose of insuring the proper performance of the requirements hereinbefore stated automatically and without the possibility of accidental or intentional interference therewith that the process which forms the subject matter of this application is principally designed.

In the apparatus illustrated in the drawings, the liquid, after being heated to the desired temperature, is caused to pass into the cylindrical holder A through the pipe J which enters through the wall of.the said holder below said cover A and has its discharge end connected with the pan G by means of a collar G in the side of said pan vterial, or entirely omitted in order that the depthof the liquid therein may be ascer tained. From the pan G the liquid passes,

through the depending outlet tube Gr down" to the float B, which in the usual operative condition of the apparatusjis immediately below the said tube, since the level of liquid in the holder must. be such as to raise it to this point before there can be any discharge.

'VVhen the holder is first filled the float rises from the bottom asthe level of liquid rises, and in this operation the annular flange K concentrically arrangedwith respect to the float on the upper surface of "said float receives the liquid discharged from the tube G and checks its tendency to splash against the .sides of the holder by causing a pool to be tor-oiled, emu open-- ings K are located at in' )rvals .lonp' the lower edge of the Ila hi liir the purpose of permitting all oi. the liquid therein to flow out,

The lioat is provided with a p urality Ofll spacers l) extending radially tlW'eItronti. and preferably located )0 degrees part, so as to space the said float from the walls of the holder and maintain its position in the cen tcr thereof. The extrei'i'iities oil the spacing arms D are drawn. downwardly to form do pending portions l), and the lower ends of these depending portions are inwardly curred. The object ol this provision is to preventthe spacers from catching o'i'er or under the annular flanges D ,tL sharp cor-- ner also avoided in bending the parts l)" downward so that the angle will readily pass over the inner edges oi? the flanges. i in annular horizontal flange or rim t) is also provided at the outer edge of the upper sin--- face of the float, and extends approxiinately half the distance from the said outer edge to the walls of the holder. The object and purpose of this flange to give the liquid flowing from the medial part of the convex upper surface of the float a horizontal direction and proide a surface in addition to the upper surface of the limit upon which it may spread and by which it will be caused to enter the body of: liquid in a thin, slowly Flowing body lit will be observed that this flange C is so formed and placed as to be normally slightly sulnnerged, and the object of this {molds-ion is to still further check the outward How of the liquid before it reaches the liquid body in the holder. lily these means the liquid is received and cans d to spread out gently upon the upper sin 7 ot the liquid body in the holder, without receiving any material vertical movement either through its initial movement on entering the holder or througrl'i contact. with the walls or other parts thereof. The result that the liquid entering the holder remains on the top of the liquid body and as it cools, and its specific gravity is thereby increased, settles toward the bottom, fresh and warmer liquid flowing in above it constantly, it is, therefore, only necessary to gage the flow of liquid into the holder so that it will fill and empty once in each half horur or other predetern'iined timein order to insure that each particle entering the holder shall remain therein substantially throughout the full period and be discharged therefrom only after it has been subjected to the (lesircd temperature for the proper period of time. The lloat is provided with a loop ll by which it may be raised from the bottom of the holder and removed, if desired.

it will be dbserved that in the operation of this process variation in the specific grat ity of the liquid due to slight ditlerence in temperature is utilized to secure the gradual passage of eanh drop through the holder, and that in the apl'iaratus shown this action is inaugurated by the deposition of the freshly heated liquid in sucha manner that because of the inferior gravity it will spread out over the top of the liquid body. Auxiliary n'ieans, such as ballle plates and flanges, may be employed in carrying out the process to further protect the How of liquid by its thermal gravity from being disturbed or interrupted.

dr'hut l claim, is:

l. The hereiu-described process otsterilizing liquids which consists in first heating and then spreading the liquid upon the upper surface oi a body of liquid having a mean lower tcnqierature in such a manner as to prevent vertical nmvemeut thereof, and withdrawing the liquid from the lower part of said body at a rate not exceeding the rate of inflow, whereby each atom of the liquid is caused to gravitate gradually from the top to the point of withdrawal through the body by reason o1 its relative thermal specific gravity and is retained therein a period of time substantially equal to the time required for the entire body to be withdrawn.

53. The herein described process of sterilizing liquids which consists in first heating the liquid and then causing it to flow through a holder by gravity and to be dotained therein for a given period determined by the period required for the (llSCllttl'tIC of substantially all the liquid in said holder, the relative time of discharge ol said liquid with respect to that 'ireceding' and followinp; it being determined by its relative specitic gravity due to temperature.

3. The process of sterilizing liquids herein described which consists in maintaining a body of the liquid of predetermined volume in a container, said volume being de termined by the period of time required for it to pass out of said container, and flowing heated liquid upon the upper surface ol the said body in. such a manner that it is spread out horizontally thereon, and withdrawing the liquid from the lower part of said container at the same rate as the rate of influx.

.Vitncss my hand this 20th day of January, 1911. at the city of New York, in the county and State of New York.

Wllilil Al /l ll. PARK.

W it ncsses l6. W. SCHI'JRR, Jia, ALAN (l. il'lODUNNlGLL. 

